Electric hot-water heater



Sept. 11, 1923.

A. C. HULBERT ELECTRIC HOT WATER HEATER Filed Oct. 17

INVENTOR flneei' CCZQZJer-l.

Patented Sept. 11, 1923.

. UNITED .STATES AHSEL C. HULBEBT, OF SAN CARLOS, CALIFORNIA.

ELECTRIC HOT-WATER HEATER.

Application filed October 17, 1921. Serial No. 508,174.

To all whom it may concern:

Be it known that I. ANSEL C. Hmnmrr, a

v citizen of the United States, residing at San Carlos, in the county of San Mateo, State of California, have invented a new and useful Electric Hot-Water Heater, of which the following is a specification, in such full and clear terms as will enable those skilled in the art to construct and use the same.

This invention relates to an electrical hot water heater and its object is to provide an automatic hot water heater which is capable of maintaining a supply of hot water at all times and which is self regulating.

Another object of the invention is to provide means whereby the electric current used to heat the water is capable of being broken with a step by step movement, whereby a smaller breaking gap is possible than if the current were taken ofi all at one time.

A further objectof the invention is to provide an apparatus which will be completely insulated so as to reduce the heat loss by radiation or conduction to the minimum.

A further object of the invention is to provide an electrical heater which is capable of being installed on any kitchen boiler without the use of special apparatus, the water heating chamber and regulating chamber be: ing a self-contained unit separate from the storage reservoir.

Other objects of the invention will appear as the description proceeds.

An embodiment of the invention is shown in the accompanying drawings in which the same reference rnumeral is ap 'lied to the same portion throughout, but am aware that there may be modifications thereof.

Fig. 1 is a side elevation of a boiler showinghthis heater installed in connection therewit I Fig. 2 is a vertical sectional view through the heater illustrating diagrammatically the wiring used in conjunction therewth.

Fig. 3 is a front elevation of the regulating apparatus with the protecting cover removed.

Fig. 4 is a diagrammatic plan of'the complete wiring system.

Fig. 5 is a diagrammatic elevation of the regulating apparatus showing the applicatiorrot the circuit wires thereto, and:

F g. 6 is a view partly in longitudinal section of the complete regulatingapparatus.

The ordinary kitchen boiler is indicated at 1. This has the supply pipe 2 and hot water pipe 3 connected therewith at the top.

On the side of the boiler there is a pipe 4: which extends to the water heating chamber 5, and a pipe 6 extends from the bottom of the water heating'chamber into the bottom of the water, a pipe 7 provided with the faucet 8 being used for cleaning the boiler whenever that is necessary.

The heating chamber consists of 9. rectangular cast iron box of such height as may be convenient to receive a plurality of electrical heating tubes 9 to 12 inclusive. Two of these tubes are installed from the right hand side of the heating chamber and are carried by plugs 13 and 14:, while the other two tubes are carried by plugs 15 and 16 screwed into the other side of the water heater. I Near the bottom of the water heater there Is the regulator 13. This regulator has a tube 18 which has any suitable thermostat element contained therein capable of moving the diaphragm 19. The diaphragm covers a flange 20 and is held in place against the same by means of the flange 21 suitable screws 22 being used for this purpose.

The diaphragm has a button 23 secured thereto which bears upon one end of a pin 24, said pin extending through a bearing 25 supported by the flange 21. A stifi' spiral spring 26 bears upon the diaphragm l9 and against the material within the tube 18 the necessary pressure for properly operating the pin.

Two cars 29, 30 support 8. depending lever 31, the pin 24 bearing upon said lever for its operation. lit is provided with an insulatin tube 32 vvhich is extended to bear upon a of the contact making arms 33 to 36 inclusive. These, arms are secured to a bar 3'1 suitably insulated, screws bein used to hold the bar and arms in place, an when the temperature is sufiicientl reduced the liquid within the tube 18 wil contract sufficiently to allow all of the contact making arms to contact with the screws 40, of which there are four, one for each contact arm.

A wireetl leads to the binding post 42 on the fiber block 43 at the lower portion of the flange 21, and from this point suitable connections are made with the lower ends of the contact arms by means of the wire 44 and bar 37.

The adjustment of the electrical connec- "ions "E'iiGfitQd i257 the :Eoer screws 10 sci 'uscm .3 being such that ene heating circmc Will be at a time, and the entire series e four circuits Wiii remain fly the heater ifibyfil of nemeat the ioss oi cciiec radiation or con- 1 the F in we end percicuicii-i \iescr ci' form, Within cur- View mi in 1., A W ing e cpemtus ccmpyising 1 Wecerc scoir'ege Lacie, means to 'suppiy said recepcecie WALL Weaker to withdrew Water 3 heating receptecie, electric he 1:: said receptacle, pipes fer comic meg seifl receptacle sceiege srecepcecie at bottom ccci at 21 be -i T: e its bottom and b-op epiuelements exceeding recep'mcie, c fliermosta'i; J of iieebii g 5eeiectric hem;

said heating receptacle, and m ce ciacie for controlling the curr nt supplied to said heating elements, and means to break the curcem used Ste by step.

2. An electric heating apparatus comprisiiige hoc Water storage i-eceptecie, pipes fer supplying said receptacle with water and for Withdrawing Water theieficm, a heating recep'cecie pipes extending from the bottom the Wet-er receptacle so the bottom of the iiectizig receptacle and from the to o? the heating receptacle to e higher per fen of the waier receptacle, 3, piui'eiiizy o'if 8i68LTii192i7- ing elements extending into scici heati g receptecle, a thermostat in the lower per on of 's fer recki/I'iC 21y "the current used, in the eie elements one eiemene at a time 3. An el ctric heating ep acrebus comprising e hot Water storage recap-5ccie pipes to supply to and remove Water from said fine circuits on the electric heaters one at a time.

in testimeriy whereof i have hereunto set my mmxi tins 6th day cf @ctober, A. D.

1'1 ULBE 

